Effect of Surface Scattering of Electrons on Ratios of Optical Absorption and Scattering to Extinction of Gold Nanoshell
Abstract Gold nanoshell’s high light scattering and absorption at its resonance wavelength have found applications in biomedical imaging and photothermal therapy. However, at nanoscale, metallic material’s dielectric function is affected by nanoparticle’s size, mainly via a mechanism called surface...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2018-09-01
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| Series: | Nanoscale Research Letters |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s11671-018-2670-7 |
| _version_ | 1797706992350920704 |
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| author | Yiyang Ye T. P. Chen Zhen Liu Xu Yuan |
| author_facet | Yiyang Ye T. P. Chen Zhen Liu Xu Yuan |
| author_sort | Yiyang Ye |
| collection | DOAJ |
| description | Abstract Gold nanoshell’s high light scattering and absorption at its resonance wavelength have found applications in biomedical imaging and photothermal therapy. However, at nanoscale, metallic material’s dielectric function is affected by nanoparticle’s size, mainly via a mechanism called surface scattering of conduction electrons. In this work, the effect of surface scattering of electrons on the ratios of optical absorption and scattering to extinction (which is the sum of the absorption and scattering) of gold nanoshell is investigated. Simulation results for several shell thicknesses are compared. It is found that the electrons’ surface scattering increases the optical absorption ratio, and the thinner the shell thickness, the larger the increase in the difference of the absorption ratio between the situations with and without the surface scattering considered. The increase of absorption ratio is then verified by comparing simulation results to experimental measurements for three nanoshells. The parameters of the simulations to fit the experimental measurements show that the damping of conduction electrons in metallic shell geometry is larger than that predicted by the billiard scattering model. |
| first_indexed | 2024-03-12T05:59:33Z |
| format | Article |
| id | doaj.art-6246693cc180481bacc05ef56e52f1d6 |
| institution | Directory Open Access Journal |
| issn | 1931-7573 1556-276X |
| language | English |
| last_indexed | 2024-03-12T05:59:33Z |
| publishDate | 2018-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Nanoscale Research Letters |
| spelling | doaj.art-6246693cc180481bacc05ef56e52f1d62023-09-03T04:14:01ZengSpringerOpenNanoscale Research Letters1931-75731556-276X2018-09-0113111110.1186/s11671-018-2670-7Effect of Surface Scattering of Electrons on Ratios of Optical Absorption and Scattering to Extinction of Gold NanoshellYiyang Ye0T. P. Chen1Zhen Liu2Xu Yuan3School of Electrical and Electronic Engineering, Nanyang Technological UniversitySchool of Electrical and Electronic Engineering, Nanyang Technological UniversitySchool of Materials and Energy, Guangdong University of TechnologySchool of Materials Science and Engineering, Nanyang Technological UniversityAbstract Gold nanoshell’s high light scattering and absorption at its resonance wavelength have found applications in biomedical imaging and photothermal therapy. However, at nanoscale, metallic material’s dielectric function is affected by nanoparticle’s size, mainly via a mechanism called surface scattering of conduction electrons. In this work, the effect of surface scattering of electrons on the ratios of optical absorption and scattering to extinction (which is the sum of the absorption and scattering) of gold nanoshell is investigated. Simulation results for several shell thicknesses are compared. It is found that the electrons’ surface scattering increases the optical absorption ratio, and the thinner the shell thickness, the larger the increase in the difference of the absorption ratio between the situations with and without the surface scattering considered. The increase of absorption ratio is then verified by comparing simulation results to experimental measurements for three nanoshells. The parameters of the simulations to fit the experimental measurements show that the damping of conduction electrons in metallic shell geometry is larger than that predicted by the billiard scattering model.http://link.springer.com/article/10.1186/s11671-018-2670-7NanoshellSurface scatteringLight absorptionLight scattering |
| spellingShingle | Yiyang Ye T. P. Chen Zhen Liu Xu Yuan Effect of Surface Scattering of Electrons on Ratios of Optical Absorption and Scattering to Extinction of Gold Nanoshell Nanoscale Research Letters Nanoshell Surface scattering Light absorption Light scattering |
| title | Effect of Surface Scattering of Electrons on Ratios of Optical Absorption and Scattering to Extinction of Gold Nanoshell |
| title_full | Effect of Surface Scattering of Electrons on Ratios of Optical Absorption and Scattering to Extinction of Gold Nanoshell |
| title_fullStr | Effect of Surface Scattering of Electrons on Ratios of Optical Absorption and Scattering to Extinction of Gold Nanoshell |
| title_full_unstemmed | Effect of Surface Scattering of Electrons on Ratios of Optical Absorption and Scattering to Extinction of Gold Nanoshell |
| title_short | Effect of Surface Scattering of Electrons on Ratios of Optical Absorption and Scattering to Extinction of Gold Nanoshell |
| title_sort | effect of surface scattering of electrons on ratios of optical absorption and scattering to extinction of gold nanoshell |
| topic | Nanoshell Surface scattering Light absorption Light scattering |
| url | http://link.springer.com/article/10.1186/s11671-018-2670-7 |
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